26 KEMIRA
Saving energy in waste water treatment
Measurement of a molecule described as the ‘energy currency of life’ provides the key to knowing the amount of biomass in waste water and its treatment. PPL magazine reports
be achievable by mill operators using LumiKem Wastewater technology deeloped by Sweden- based Kemira. LumiKem includes cutting-
H
edge equipment, test kits and Information Management Software that provides a gain deeper insight into waste water treatment operations. This insight spans the entire process range from early toxicity detection to energy cost optimisation. The technology is designed to function in any biological waste water treatment process by providing real-time measurement of: • toxicity level in untreated, incoming waste water and process effluents • the active biomass population • bio-stress index levels • solids behaviour and viability • floc bulking, to help predict bulking events. By combining LumiKem
technology with the Information Management software Portal G2, Kemira offers a new approach to the process and cost management of a waste water treatment plant. Waste water treatment
processes often carry an excessively large solids content which leads to high operating costs. Accurate management is the key component of this optimisation process.
May 2013
igher levels of waste water treatment performance and cost savings are said to
Pulp Paper & Logistics
Through optimising and
revitalising activated sludge treatment systems with LumiKem developed technology, a plant can also expect to save on electricity costs spent in oxygen delivery by aeration pumps (the major consumer), sludge disposal, incineration, solids handling and other waste cost in a typical plant. LumiKem parameters, which
give an indication of true living biomass quantity and quality at every location of the waste water treatment process, provide operators and engineers with the peace of mind to reduce the quantity of total solids in their system and focus more on controlling and maintaining a
stable living biomass population. LumiKem test kits are based on
the measurement of adenosine triphosphate (ATP), which has been described by biologists as the ‘energy currency of life’ within cells. It provides a direct and interference-free indicator of total biomass. A sample containing ATP is introduced to an assay containing the enzyme luciferase, which naturally occurs in the tails of fireflies, to produce light. The light is detected in a Luminometer as Relative Light Units (RLU) and results are available in less than five minutes. LumiKem test kits provide multiple tests that are performed daily on relevant samples
from a plant’s process. These measurements (including tATP, dATP and fbATP) are then used to determine as many as four valuable key process indicators: • Active Volatile Suspended Solids (AVSS) – represents the true mass of living microorganisms. This parameter greatly facilitates inventory and process management. AVSS is calculated from the concentration of Cellular ATP (cATP) found in the sample. • Biomass Stress Index (BSI) – represents the stress level experienced by the microbiological population. This parameter is very useful in monitoring for toxicity in and around bioreactors. • Active Biomass Ratio (ABR) –
Page 1 |
Page 2 |
Page 3 |
Page 4 |
Page 5 |
Page 6 |
Page 7 |
Page 8 |
Page 9 |
Page 10 |
Page 11 |
Page 12 |
Page 13 |
Page 14 |
Page 15 |
Page 16 |
Page 17 |
Page 18 |
Page 19 |
Page 20 |
Page 21 |
Page 22 |
Page 23 |
Page 24 |
Page 25 |
Page 26 |
Page 27 |
Page 28 |
Page 29 |
Page 30 |
Page 31 |
Page 32 |
Page 33 |
Page 34 |
Page 35 |
Page 36